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Interaction of marine turbines in close proximity

O'Doherty, Daphne Maria, Mason-Jones, Allan, Morris, Ceri E., O'Doherty, Timothy, Byrne, Carlton Barrie Baylis, Prickett, Paul William and Grosvenor, Roger Ivor 2011. Interaction of marine turbines in close proximity. Presented at: 9th European Wave and Tidal Conference 2011, Southampton, UK, 5-9 September 2011. Proceedings of the 9th European Wave and Tidal Conference, Southampton, UK, 5th-9th September 2011. Southampton: University of Southampton,

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Abstract

This paper describes the results of a CFD assessment of a small array of turbines. The primary objective was to determine how the separation between turbines affects the output from the individual, and hence collective, turbines. The turbines considered have been scaled from a validated laboratory turbine, using non-dimensionalised terms. The results of this work identify that the separation between the turbines can be reduced to approximately two turbine diameters, where the flow accelerates between the turbines. This increased velocity results in a small increase in the power output. Counter rotating turbines in a row were also shown to improve the performance. The rotational flow between the turbines is in the same direction thus reducing the shear rate. In addition, the lateral position of a second row of turbines can be as critical to the power output as the downstream distance from the first row. Turbines, however, positioned directly behind the first row of turbines, at the same longitudinal position, show a reduction in the velocity and an increased level of turbulence, hence reduced power output.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
Uncontrolled Keywords: Tidal Turbine Arrays, CFD, HATT, power, turbine configuration.
Publisher: University of Southampton
Related URLs:
Last Modified: 04 Jun 2017 04:29
URI: http://orca.cf.ac.uk/id/eprint/39819

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